Hi there,
Welcome to the QuickBooks Community. QuickBooks allows you to manage your accounting with ease. I'll be happy to share more info so you're on the right track with your work.
Here's a helpful article that provides more info about connecting your bank: Connect bank and credit card accounts to QuickBooks Online.
If you're unable to connect your bank account to the bank feed automatically, simply follow the steps in this article to see how to Manually upload transactions into QuickBooks Online. Once you've uploaded your transactions, you can match them with ease using the guidance in this article here. Lastly, here are some helpful tutorials/webinars you can check out in order to cut the learning curve.
Let me know if this info helps. I'll be one message away in case you have other questions. Otherwise, I wish you a great rest of the day!